Magnitude 3.6, Tue Apr 2 2024 5:44 AM


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Origin


PublicID 2024p247832
UTC Time 2024-04-01T16:44:21Z
Latitude -35.13 (± 29.6 km)
Longitude 178.03 (± 58.4 km)
Depth 218 km (± 51 km)
Depth Type free
Earth Model iasp91
Used Phase Count 11
Used Station Count 8
Standard Error 0.52 (s)
Azimuthal Gap 342.14 (degrees)
Minimum Distance 2.85 (degrees)

Magnitudes


Type Magnitude Station Count
Preferred (MLv) 3.6 (± 0.5)  
MLv 3.6 (± 0.5) 2
ML 3.3 (± 0.3) 4
M 3.6 2

GeoNet combines magnitudes into a summary magnitude, M, which consists of a weighted average of the individual magnitudes and attempts to be a best possible compromise between all magnitudes for a range of earthquake sizes. Summary magnitude for GeoNet is then defined as:

M = (2 * MLv + (0.4 * number_of stations(Mw(mB)) - 1) * Mw(mB)) / (2 + (0.4 * number_of_stations(Mw(mB)) - 1))

Where MLv is local magnitude calculated on the vertical component and Mw(mB) is a Mw estimation based of mB by Bormann and Saul (2008).

Origin Map


Map of New Zealand.

Map showing stations with picks used to locate the earthquake. Stations with picks that have a zero weight in the solution are shown as small grey circles. Those with a higher weight are shown as larger circles. The quake is shown by the largest circle.

Pick Residuals


-2.0-1.00.01.02.0residual (s)0123456Distance (degrees)Pick Residuals

Station Magnitudes (MLv)


0.01.02.03.04.0Magnitude45Distance (degrees)Station Magnitudes (MLv)

Station Magnitudes (ML)


0.01.02.03.04.0Magnitude4Distance (degrees)Station Magnitudes (ML)

Magnitude Residuals (MLv)


-1.00.01.0Residual45Distance (degrees)Magnitude Residuals (MLv)

Magnitude Residuals (ML)


-1.00.01.0Residual4Distance (degrees)Magnitude Residuals (ML)